<template>
    <div>
        <!--        面包屑导航区-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!--        卡片视图区域-->
        <el-card>
            <!--            添加角色按钮区域-->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <!--            角色列表区域-->
            <el-table :data="rolesList" border stripe>
                <!--                展开行-->
                <el-table-column type="expand" label="详情">
                    <template slot-scope="scope">
                        <el-row
                                :class="['bdbottom',index1 == 0 ? 'bdtop' : '','vcenter']"
                                v-for="(item1,index1) in scope.row.children"
                                :key="item1.id">
                            <!--                            渲染一级权限-->
                            <el-col :span="5">
                                <el-tag
                                        @close="removeRightById(scope.row,item1.id)"
                                        closable>{{item1.authName}}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!--                            渲染二级和三级权限-->
                            <el-col :span="19">
                                <el-row
                                        :class="[index2 != (item1.children.length-1)? 'bdbottom': '','vcenter']"
                                        v-for="(item2,index2) in item1.children"
                                        :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag
                                                @close="removeRightById(scope.row,item2.id)"
                                                type="success" closable>{{item2.authName}}
                                        </el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag
                                                v-for="(item3,index3) in item2.children"
                                                :key="item3.id"
                                                closable
                                                @close="removeRightById(scope.row,item3.id)"
                                                type="warning">{{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>

                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button
                                size="mini"
                                type="warning"
                                icon="el-icon-setting"
                                @click="showSetRightDialog(scope.row)">分配权限
                        </el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

<!--         分配权限的对话框-->
        <el-dialog
                title="分配权限"
                :visible.sync="setRightDialogVisible"
                width="50%"
                @close="setRightDialogClosed">
<!--            树形控件-->
            <el-tree
                    :data="rightsList"
                    :props="treeProps"
                    show-checkbox
                    node-key="id"
                    default-expand-all
                    :default-checked-keys="defaultKeys"
                    ref="treeRef">
            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>

    </div>
</template>

<script>
    export default {
        data() {
            return {
                // 所有角色列表数据
                rolesList: [],
                // 控制分配权限对话框的显示与隐藏
                setRightDialogVisible: false,
                // 所有权限的数据
                rightsList:[],
                // 树形控件的属性绑定对象
                treeProps: {
                    label: 'authName',
                    children: 'children'
                },
                // 默认选中的节点的id值数组
                defaultKeys:[],
                // 当前即将分配权限的角色id
                roleId: ''
            }
        },
        created() {
            this.getRolesList()
        },
        methods: {
            // 获取所有角色的列表
            async getRolesList() {
                const {data: res} = await this.$http.get(`roles`)
                if (res.meta.status !== 200) return this.$message.error("获取角色列表数据失败")
                this.rolesList = res.data
            },
            // 根据id去删除权限
            removeRightById(role, rightId) {
                this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).then(async () => {
                    const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                    if (res.meta.status !== 200) return this.$message.error("删除权限失败")
                    this.$message.success(res.meta.msg)
                    role.children = res.data
                }).catch(() => {
                    this.$message({
                        type: 'info',
                        message: '已取消删除'
                    });
                });
            },
            // 分配权限的对话框
            async showSetRightDialog(role) {
                this.roleId = role.id
                const {data : res} = await this.$http.get(`rights/tree`)
                if(res.meta.status !== 200) return  this.$message.error("获取权限列表失败")
                this.rightsList = res.data
                // 递归获取三级节点的id
                this.getLeafKeys(role,this.defaultKeys)
                this.setRightDialogVisible = true
            },
            // 通过递归的形式,获取角色下所有三级权限的id,并保存到
            //  defaultKeys的数组中
            getLeafKeys(node,arr) {
                // 如果当前node节点不包含children属性,则是三级节点
                if(!node.children) {
                    return arr.push(node.id)
                }

                node.children.forEach(item =>{
                    this.getLeafKeys(item,arr)
                })
            },
            // 关闭分配权限对话框时清空defaultKeys的值
            setRightDialogClosed() {
                this.defaultKeys = []
            },
            // 点击为角色分配权限
            async allotRights() {
                const keys = [
                    ...this.$refs.treeRef.getCheckedKeys(),
                    ...this.$refs.treeRef.getHalfCheckedKeys()
                ]
                const idStr = keys.join(',')

                const {data: res } = await this.$http.post(`roles/${this.roleId}/rights`,{
                    rids:idStr
                })

                if(res.meta.status !== 200 ) return  this.$message.error("分配权限失败")
                this.$message.success("分配权限成功")
                this.getRolesList()
                this.setRightDialogVisible = false
            }
        }
    }
</script>

<style lang="less" scoped>
    .el-tag {
        margin: 7px;
    }

    .bdtop {
        border-top: 1px solid #eee;
    }

    .bdbottom {
        border-bottom: 1px solid #eee;
    }

    /*一级权限 二级权限 居中对齐*/
    .vcenter {
        display: flex;
        align-items: center;
    }
</style>
